How to Bill CPT 99310 for Hospital and Inpatient E/M Services

When to Use CPT Code 99310

CPT 99310 is used for hospital-based evaluation and management (E/M) services, including inpatient, observation, and facility care.

• •Service type: Hospital / inpatient E/M
• •Setting: Hospital, observation unit, or facility
• •Billing basis: Medical decision making or total time

Common scenarios:

• •Initial hospital admission
• •Daily inpatient rounds
• •Observation care
• •Hospital discharge management
• •Facility-based patient care

Insurance Verification Tips for CPT 99310

1. •Confirm patient status (observation vs inpatient).
2. •Select codes based on documented complexity or time.
3. •Track admission and discharge dates carefully.
4. •Avoid duplicate billing across care settings.

Example Case of CPT 99310

A provider evaluates and manages a hospitalized or facility-based patient and documents the appropriate level of care.
The service is billed as one unit of CPT 99310.